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- W2021217605 abstract "용접에 의한 가스설비, 교량, 선박 등 강 구조물의 접합 방법은 대부분 십자형이나 T형의 필릿 용접으로 이루어지며 구조물의 형상과 용도에 따라 완전 용입 또는 불완전 용입 상태로 이루어진다. 본 연구에서는 십자형 필릿용접 구조물에 대하여 재료 두께별 용입 깊이에 따른 피로 균열 특성을 파악하였고, 그 결과로부터 무한수명 영역내에서의 안전 설계응력에 대하여 고찰하였다. 미 용입 길이가 길면 루트 부 파괴가 되어 무한 수명 영역은 작고 미 용입 길이가 짧으면 토우부 파괴가 되어 무한 수명 영역은 크게 나타났다. 3층 용접한 재료 두께 20mm의 경우가 2층 용접한 재료 두께 10mm, 15mm의 경우보다 미세한 페라이트 침상 조직을 더 많게 형성시켜 노치 인성을 증가시키므로 서 피로강도와 무한 수명을 더 향상시킨 것으로 나타났다. The joining methods of steel structures of gas facilities, bridges, ships etc. by welding are composed mostly of T-type or cruciform fillet welding and full penetration or partial penetration according to the uses and the shape of the structures. In this study, it was examined the characteristics of fatigue crack according to penetration depth in relation to material thickness in the cruciform fillet welded joints. From the results, it was investigated the safe design stresses within the range of infinite life. When the LOP length is long the range of infinite life is small with root failure and when the LOP length is short the range of infinite life is large with teo failure. For the specimen of material thickness, 20mm welded by 3 pass compared with 10mm, 15mm welded by 2 pass, the fatigue strength and the range of infinite life was more improved by increasing of notch toughness from formation of micro-ferrite acicular structure." @default.
- W2021217605 created "2016-06-24" @default.
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- W2021217605 date "2013-02-28" @default.
- W2021217605 modified "2023-10-05" @default.
- W2021217605 title "A Study on Estimation of Infinite Fatigue Life in Cruciform Fillet Welded Joint" @default.
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- W2021217605 doi "https://doi.org/10.7842/kigas.2013.17.1.19" @default.
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